Hydrocracking method

A hydrocracking and catalyst technology, applied in chemical instruments and methods, hydrocarbon oil cracking, molecular sieve catalysts, etc., can solve the problem that the freezing point, density, distillation range, nitrogen content and other indicators of jet fuel have not been significantly improved, and the output cannot meet market demand , reduce the mercaptan sulfur content of aviation fuel products, and achieve good cracking activity and product selectivity, a high proportion of mesopores, and a good pore size distribution range

Active Publication Date: 2017-11-14
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

China's existing aviation kerosene production technologies are mainly straight-run jet kerosene hydrofining technology and hydrocracking technology. Compared with diesel or gasoline products, jet kerosene products have more advantages in profit, which greatly promotes the increase of jet kerosene production by major oil refineries products, but its output is restricted by the nature of processed crude oil and the characteristics of the two jet fuel production technologies and cannot meet market demand
[0003] Conventional jet fuel low-pressure hydrofining technology is to hydrotreat straight-run jet fuel distillates under moderate conditions, greatly reducing the mercaptan sulfur content of jet fuel products, and increasing the smoke point of jet fuel by 0.5~1.0mm, but It has no obvious improvement effect on the freezing point, density, distillation range, nitrogen content and other indicators of aviation kerosene, so that the main domestic refineries generally control the dry point of straight-run aviation kerosene below 240°C to ensure that the freezing point of aviation kerosene products is qualified

Method used

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Examples

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Effect test

Embodiment 1

[0053]Take 278g of NaY raw powder and put it into 800mL of clean water, raise the temperature to 95°C, and start to add dropwise (NH 4 ) 2 SiF 6 Aqueous solution, 307mL solution concentration is 72g / L (NH 4 ) 2 SiF 6 solution, stirring at constant temperature for 2 hours after the dropwise addition, filtering and drying after the completion of the constant temperature, the dry basis of the dried molecular sieve is 65.3wt%; the above-mentioned dried molecular sieve is added to the hydrothermal treatment device, under gauge pressure 0.25MPa, temperature Under the conditions of 610°C and treatment time of 1.0 hour, carry out hydrothermal treatment on molecular sieve; take 130g of molecular sieve after hydrothermal treatment and put it into 520mL aqueous solution of tetraethylammonium hydroxide with a mass concentration of 5.3%, and stir at constant temperature at 80°C for 4 hours , and then transfer the mixed material to a crystallization tank for hydrothermal crystallization...

Embodiment 2

[0055] Take 278g of NaY raw powder and put it into 800mL of clean water, raise the temperature to 100°C, and start to add dropwise (NH 4 ) 2 SiF 6 Aqueous solution, 182mL solution concentration is 55g / L (NH 4 ) 2 SiF 6 solution, stirring at constant temperature for 2 hours after the dropwise addition, filtering and drying after the completion of the constant temperature, the dry basis of the dried molecular sieve is 68.0wt%; the above-mentioned dried molecular sieve is added to the hydrothermal treatment device, under gauge pressure 0.30MPa, temperature Under the conditions of 670°C and treatment time of 2.0 hours, the molecular sieve was hydrothermally treated; 130g of the hydrothermally treated molecular sieve was put into 910mL of tetrapropylammonium hydroxide aqueous solution with a mass concentration of 7.5%, and stirred at 90°C for 4 hours , and then transfer the mixed material to a crystallization kettle for hydrothermal crystallization, the crystallization temperat...

Embodiment 3

[0057] Take 278g of NaY raw powder and put it into 1000mL of clean water, raise the temperature to 100°C, and start to add dropwise (NH 4 ) 2 SiF 6 Aqueous solution, 417mL solution concentration is 85g / L (NH 4 ) 2 SiF 6 solution, stirring at constant temperature for 3 hours after the dropwise addition, filtering and drying after the completion of the constant temperature, the dry basis of the dried molecular sieve is 67.2wt%; the above-mentioned dried molecular sieve is added to the hydrothermal treatment device, under gauge pressure 0.35MPa, temperature Under the conditions of 700°C and treatment time of 3.0 hours, the molecular sieve was hydrothermally treated; 130g of the hydrothermally treated molecular sieve was put into 1040mL of tetraethylammonium hydroxide aqueous solution with a mass concentration of 3.5%, and stirred at a constant temperature of 85°C for 3 hours , and then transfer the mixed material to a crystallization tank for hydrothermal crystallization, the...

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Abstract

The invention discloses a hydrocracking method which comprises the following steps that a straight-run diesel oil raw material is in contact with a hydrocracking catalyst to carry out hydrocracking reaction, and an obtained hydrocracking product is separated to obtain heavy naphtha, diesel oil, a jet fuel and hydrogenation tail oil, wherein the used hydrocracking catalyst adopts a modified Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide as carriers, and the modified Y-shaped molecular sieve is an Y-shaped molecular sieve which is rich in meso pores and is concentrated in effective pore size distribution. The hydrocracking method is particularly suitable for a hydrocracking technology for carrying out hydro-conversion on straight-run diesel oil to produce the jet fuel, and has very high catalytic activity and aviation fuel product yield and the quality of a product is improved.

Description

technical field [0001] The invention relates to a hydrocracking method, in particular to a hydrocracking method for converting straight-run diesel to produce jet fuel (also known as jet fuel). Background technique [0002] With the continuous expansion of the international air transport industry, the global demand for aviation fuel is increasing year by year, with an annual growth rate of about 5.0%, which is much higher than the annual growth rate of gasoline and diesel of 1.0% to 1.5%, which has greatly driven the global Demand for high-quality aviation fuel products in the oil market. In 2014, China's domestic air transport industry showed a good momentum of development. Against the backdrop of an overall slowdown in demand growth in the refined oil market, the aviation fuel market still maintained a booming supply and demand and a high-speed growth trend. According to data from the National Bureau of Statistics, China's kerosene consumption in 2014 was 23.55 million ton...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/20C10G47/18B01J29/16
CPCB01J29/166B01J2229/18B01J2229/32B01J2229/40C10G47/18C10G47/20C10G2300/1055C10G2300/1059
Inventor 刘昶王凤来关明华杜艳泽黄薇赵红郝文月曹均丰
Owner CHINA PETROLEUM & CHEM CORP
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